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@article{AM2_1986__30_137131, author = {Jan van de Craats}, title = {An unexpected appearance of {Steiner's} hypocycloid.}, journal = {Aequationes mathematicae}, pages = {239--251}, publisher = {mathdoc}, volume = {30}, year = {1986}, zbl = {0586.51020}, url = {http://geodesic.mathdoc.fr/item/AM2_1986__30_137131/} }
Jan van de Craats. An unexpected appearance of Steiner's hypocycloid.. Aequationes mathematicae, Tome 30 (1986), pp. 239-251. http://geodesic.mathdoc.fr/item/AM2_1986__30_137131/